Push back vector into vector c++ code example

Example 1: java vector push_back

// push_back equivalent
ArrayList<int> a = new ArrayList<int>();
a.add(2);             // Add element to the ArrayList.
a.add(4);

// pop_back equivalent.
a.remove(a.size()-1); // Remove the last element from the ArrayList.

Example 2: find vector push_back in c++

//Let us say we have a vector v with elements {1, 2, 3, 4}
//To pushback 5
v.push_back(5);